91 350 Sd Temperature Gauge Not Working
 

Need some help.

After the mechanic changed the transmission on my car the temperature gauge stopped working ( most likely the transmission has nothing to do with the temperature gauge but I would like to tell the whole story).

I checked the temperature gauge it is good as a unit ( i connected a completely different temperature sensor and it works) but does not show temperature with regular temp. senson in car

I thought it is broken temp sensor so i purchased a new one but it is still the same gauge does not show temperature.

Any help appreciated

very interesting, I guess nobody had this kind of promlem before

sounds like your wire is broken somewhere between the sensor and the guage. check that
m

I don't think it is a broken wire because when I put a different temp sensor it shows temperature ( the real one has 2 pronges , i put one with one pronge , on original is 130 c temp and on one that I put is maybe 90 c , when driving the fans are comming on even with + 15 c outside ) it must be something different I think

sounds like it sorry could not help, the only other thing I could think of is the ground.
m

Could this be a relay or something like that?